XRD光谱参数的合理确定方法及对煤石墨化的响应研究  

Study on reasonable determination method of XRD spectral parameters and its response to coal graphitization

作　　者：胡广青 韩锋 刘伟 高宇航 吴盾 张文永[3] 罗卉卉 张燕海 付彪 HU Guangqing;HAN Feng;LIU Wei;GAO Yuhang;WU Dun;ZHANG Wenyong;LUO Huihui;ZHANG Yanhai;FU Biao(Exploration research institute,Anhui provincial bureau of coal geology,Anhui Province Green Mine Engineering Research Center,Hefei 230088,China;Anhui Jianzhu University School of Civil Engineering,Hefei 230041,China;Anhui Provincial Bureau of Coal Geology,Hefei 230088,China;Huaibei Mining Industry(Group)Co.,Ltd.,Huaibei 235000;Key Metal He’nan Laboratory of Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]安徽省煤田地质局勘查研究院安徽省绿色矿山工程研究中心,安徽合肥230088 [2]安徽建筑大学土木工程学院,安徽合肥230041 [3]安徽省煤田地质局,安徽合肥230088 [4]淮北矿业(集团)有限责任公司,安徽淮北235000 [5]郑州大学关键金属河南实验室,河南郑州450001

出　　处：《煤炭科学技术》2025年第2期279-288,共10页Coal Science and Technology

基　　金：安徽省重点研究和开发计划资助项目(2022n07020005)。

摘　　要：在煤系共伴生矿产的综合利用和碳中和背景下,煤系石墨日益受到国内外学者的重点关注。XRD光谱分析作为研究分子有序程度和测定煤微晶结构的重要表征手段之一,对揭示碳微晶排列方式的有序性与煤石墨化程度之间的关系具有重要意义。为了更加科学、快速、有效的获取煤的XRD相关指标参数,不断完善煤系石墨的评价指标体系,以淮北煤田7对生产矿井的系列变质程度煤为研究对象,借助煤质分析、煤镜质体反射率和XRD等试验手段,研究不同分峰拟合方法和不同样品前处理方法对XRD光谱参数的影响,探讨基于XRD光谱分析的煤系石墨评价指标的合理确定方法及响应规律。研究表明;(1)不同分峰拟合方法对煤系石墨的评价等级结果影响较大,相对基线是否去除而言,底背是否扣除对试验结果的影响更为明显;(2)是否考虑(γ)峰对试验结果影响较大,直接影响了样品石墨化程度的划分与鉴定结果;(3)通过对不同原煤和标准Si粉配比条件下的XRD光谱曲线分析,得出在原煤与SiO_(2)质量比为3∶1条件下,采用内标法可以有效确定原煤样品(002)峰的2θ值,试验效果与脱矿物方法相当;(4) V_(daf)和H/C可推荐为淮北煤田煤系石墨鉴定的主要煤质参数指标,La、La/Lc和d002指标可推荐为淮北煤田煤系石墨鉴定的主要结构参数指标,其中V_(daf)<20%、H/C>0.035、La<4 nm、La/Lc<1和d_(002)<0.344 nm可作为淮北煤田煤变质作用进入半石墨化阶段的临界标志。上述研究成果为实现淮北煤田煤系石墨评价指标优选和鉴定体系的构建提供了参考依据。Under the background of comprehensive utilization and carbon neutralization of coal-series associated minerals,coal-series graphite has attracted more and more attention from scholars at home and abroad.As one of the important characterization means to study the degree of molecular order and determine the structure of coal microcrystals,XRD spectrum analysis is of great significance to reveal the relationship between the order of carbon microcrystal arrangement and the graphitization degree of coal.In order to obtain the XRD re-lated index parameters of coal more scientifically,quickly and effectively,and constantly improve the evaluation index system of coal-series graphite,taking 7 pairs of metamorphic coals in Huaibei coalfield as the research object,with the help of coal quality analysis,vit-rinite reflectance and XRD,the effects of different peak fitting methods and different sample pretreatment methods on XRD spectral para-meters were studied,and the effective determination method and response law of coal-series graphite evaluation index based on XRD spec-tral analysis were discussed.Research shows that;①Different peak fitting methods have great influence on the evaluation results of coal-series graphite,and whether the bottom back is deducted has more obvious influence on the experimental results than whether the baseline is removed;②Whether the(γ)peak is considered has a great influence on the experimental results,which directly affects the classifica-tion and identification results of the graphitization degree of the samples;③By analyzing the XRD spectrum curves of different raw coal and standard Si powder ratios,it is concluded that under the mass ratio of raw coal/SiO_(2)≈3∶1,the 2θvalue of(002)peak of raw coal sample can be effectively determined by internal standard method,and the experimental effect is equivalent to that of demineralization method.④V_(daf) and H/C can be recommended as the main coal quality parameters,while La,La/Lc and d_(002) can be recommended as the main structural

关 键 词：XRD 光谱分析 确定方法 煤石墨化 响应分析 

分 类 号：P618.11[天文地球—矿床学] P619.252[天文地球—地质学]